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This is the most basic and most widely used type of tapered roller bearing. It consists of two main separable parts: the cone (inner ring) assembly and the cup (outer ring). It is typically mounted in opposing pairs on a shaft.
Unit of Measure

Key Dimensions

Cone Part Number

 N/A LM11949

Cup Part Number

 N/A LM11910

Seal Part Number

 N/A LM11900EA

Bore (d)

 N/A 3/4 in19.05 mm

O.D. (D)

 N/A 1.7810 in45.237 mm

Width (T)

 N/A 0.6100 in15.494 mm
Dynamic Radial Load Rating - 90M Revs (C90) 1 N/A 2280 lbf10100 N
Dynamic Radial Load Rating - 1M Revs (C1) 2 N/A 8800 lbf39100 N
e Factor 3 N/A 0.3
Y Factor 4 N/A 2
K Factor 5 N/A 1.94

Other Dimensions

Weight

 N/A 0.28 lb0.120 Kg

Inner Ring Width (B)

 N/A 0.6550 in16.637 mm

Outer Ring Width (C)

 N/A 0.4750 in12.065 mm

Total Width (T1)

 N/A 0.641 in16.281 mm
Effective Center Location6 N/A -0.22 in-5.6 mm
Max Shaft Fillet Radius7 N/A 0.050 in1.270 mm
Max Housing Fillet Radius8 N/A 0.050 in1.27 mm

Shaft Backing Shoulder Dia. - Frontface (da)

 N/A 0.93 in23.5 mm

Shaft Backing Shoulder Dia. - Backface (db)

 N/A 0.98 in25 mm

Housing Backing Shoulder Dia. - Frontface (Da)

 N/A 1.65 in41.90 mm

Housing Backing Shoulder Dia. - Backface (Db)

 N/A 1.56 in39.62 mm

Cage Location rel. to BF (Aa)

 N/A 0.05 in1.3 mm

Cage Location rel. to FF (Ab)

 N/A -0.01 in-0.3 mm

Ratings

Dynamic Axial Rating - 90M Revs (Ca90)9 N/A 1170 lbf5220 N

Static Radial Load Rating (C0)

 N/A 7200 lbf32000 N

Factors

Y1 Factor 10 N/A 2.25
Y2 Factor 11 N/A 3.34

G1 Factor

 N/A 6.6

G2 Factor

 N/A 5.49
Geometry Factor (Cg)12 N/A 0.0441
  • 1 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values.
  • 2 Based on 1 x 106 revolutions L10 life, for the ISO life calculation method.
  • 3 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 4 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 5 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 6 Negative value indicates effective center inside cone backface.
  • 7 These maximum fillet radii will be cleared by the bearing corners.
  • 8 These maximum fillet radii will be cleared by the bearing corners.
  • 9 Based on 90 x 106 revolutions L10 life, for The Timken Company life calculation method. C90 and Ca90 are radial and thrust values for a single-row, C90(2) is the two-row radial value.
  • 10 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 11 These factors apply for both inch and metric calculations. Consult your Timken representative for instruction on use.
  • 12 Geometry constant for Lubrication Life Adjustment Factor a3l.